Air Conditioning Not Cold

[upallnight]

Originally Posted by X5F

Hello, I have a Facelift e53, N62 & I have a problem with the AC. It always worked fine & then suddenly stopped blowing cold.

I concluded that the clutch was no longer engaging so I purchased a new a/c clutch & installed it(nightmare job in vehicle)

Now you can hear AC clutch engage, but no cold air coming from vents. I have also tried hotwiring 12v to the clutch to make sure there are no other issues preventing it switching on.

Pipes do not get cold & low pressure side showing about 35psi, even if it was low I should get some cooling effect with compressor engaged.

Absolutely stuck & don’t know what else I can try to resolve this issue, ideas much appreciated!

Only one pipe should get cold, but the other pipe should be hot. Do you have a variable displacement compressor? If you do have a variable displacement compressor perhaps the variable valve that regulates the displacement is bad.